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Message: <blockquote data-quote="caseypayne69" data-source="post: 470810" data-attributes="member: 8332">I have a 5 speed GT of course.A couple weeks ago, my car wouldn't run unless I gave it gas or it would die, now yesterday and a week back for a small amount of time it would idle high high enough to never need to give it gas between shifts of even leaving first gear. When it idled down low needing gas to run, a vaccum hose was loose and after I pushed it in tighter it idled smooth. But I have now idea whats causing it to idle high. Would vaccum lines make it idle high? Is it cause the IAC is dirty?Tomorrow morning I'm gonna clean the IAC. I also noticed after highway speeds using cruise control, it later went away.</blockquote>